1. UNIX for Dummies Questions & Answers

Hello, I need to select the 3 lines above as well as below a search string, including the search string. I have been trying various combinations using sed command without any success. Can anuone help please. Thanking (2 Replies)

2. Shell Programming and Scripting

I'm trying to count the number of 2 specific characters in a very large file. I'd like to avoid using gsub because its taking too long. I was thinking something like: awk '-F' { t += NF - 1 } END {print t}' infile > outfile which isn't working Any ideas would be great. (3 Replies)

3. Shell Programming and Scripting

Hey All Can any one please suggest the procedure to search a part of line in a very large file in which log entries are entered with very high speed. i have trued with grep and egrep grep 'text text text' <file-name> egrep 'text text text' <file-name> here 'text text text' is... (4 Replies)

4. UNIX for Dummies Questions & Answers

are there any basic commands that can display lines 99 - 101 of the /etc/passwd file? I'm thinking use of head and tail, but I forget what numbers to use and where to put /etc/passwd in the command. (2 Replies)

5. Shell Programming and Scripting

Hi guys, i have a really big file, and i want to remove a specific line. sed -i '5d' fileThis doesn't really work, it takes a lot of time... The whole script is supposed to remove every word containing less than 5 characters and currently looks like this: #!/bin/bash line="1"... (2 Replies)

6. Shell Programming and Scripting

I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it. For example, Here is a portion of a zone file. IN NS ns1.domain.tld. IN NS ns2.domain.tld. IN ... (2 Replies)

7. Shell Programming and Scripting

testfile.csv 0","1125209",,"689202CBx18888",,"49",,,"NONMC",,,,,"01112010",,,,,,,"MTM- "1","",,"689202ABx19005",,"49",,,"NONMC",,,,,"01072010",,,,,,,"MTM- testfile.csv looks like above format if the second column is null then get 23rd column and store in a different varible .. add all the... (1 Reply)

8. UNIX for Dummies Questions & Answers

This could be a really dummy question. I have a log text file. What unix command to extract line from specific string to another specific string. Is it something similar to?: more +/"string" file_name Thanks (4 Replies)

9. Shell Programming and Scripting

Hello, I have a relatively large text file (25,000K) consisting of records of data. For each record, I need to create a new line based on what is already there. Every record has a block that looks like, M END > <ID> 1 > <SOURCE> KEGG > <SOURCE_ID> C00002 > <NAME> ATP;... (4 Replies)

10. Shell Programming and Scripting

I am trying to make my script as simple as a possible but, I am not sure if the way I am approaching is necessarily the most efficient or effective it can be. What I am mainly trying to fix is a for loop to remove a string from the specified files and within this loop I am trying to copy the lines... (2 Replies)